facial muscles pt. 1 Flashcards
(47 cards)
origin
fixed muscle attachment
insertion
movable attachment of the distal end of a muscle, moves towards origin
action
what a muscle does
striation
alignment of muscle fibers
belly
fleshy, central part of a muscle
tendon
connective tissue for the attachment of muscles to bones
sphincter
circular muscle constricting an orifice
antagonist
contrary action of one muscle
aponeurosis
a broad flat sheet of connective tissue that serves as a muscle attachment
synergist
muscles that cooperate with each other
fascia
fibrous membrane that covers supports, and separates muscles as well as unites the skin with the underlying tissue
superficial fascia
subcutaneous covering which allows free movement of the skin
deep fascia
envelops and binds muscles
frontalis origin
galea aponeurotica
frontalis insertion
skin of the eyebrows and root of the nose
frontalis action
raises the eyebrows and wrinkles nose
- muscle of surprise
galea aponeurotica origin
occipital and temporal bones
galea aponeurotica insertion
galea aponeurotica
galea aponeurotica action
pulling galea aponeurotica stabilizes position of frontal belly
temporalis origin
temporal fossa
temporalis insertion
coronoid process of the mandible by a tendon which lies deep to the zygomatic arch
temporalis action
closes jaw and is the primary muscle of mastication
masseter origin
zygomatic arch and bone
masseter insertion
angle and ramus of the mandible